The Securities and Exchange Commission has not necessarily reviewed the information in this filing and has not determined if it is accurate and complete.
The reader should not assume that the information is accurate and complete.

Washington, D.C. 20549


OMB Number:3235-0006
Expires:Oct 31, 2018
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Report for the Calendar Year or Quarter Ended:03-31-2020
Check here if AmendmentXAmendment Number:1
This Amendment (Check only one.):Xis a restatement.
  adds new holdings entries.
Institutional Investment Manager Filing this Report:
Name:Foresite Capital Management IV, LLC
Address:600 Montgomery Street, Suite 4500
San Francisco, CA  94111
Form 13F File Number:028-18415

The institutional investment manager filing this report and the person by whom it is signed hereby represent that the person signing the report is authorized to submit it, that all information contained herein is true, correct and complete, and that it is understood that all required items, statements, schedules, lists, and tables, are considered integral parts of this form.

Person Signing this Report on Behalf of Reporting Manager:
Name:James B. Tananbaum
Title:Managing Member
Signature, Place, and Date of Signing:
/s/ James B. TananbaumSan FranciscoCA05-28-2020
[Signature][City, State][Date]
The previously filed Form 13F inadvertently listed an incorrect issuer on the Form 13F Information Table and this Amendment is being filed to replace the name and CUSIP of such issuer with the name and CUSIP of the correct issuer.
Report Type (Check only one.):
X13F HOLDINGS REPORT. (Check here if all holdings of this reporting manager are reported in this report.)
  13F NOTICE. (Check here if no holdings reported are in this report, and all holdings are reported by other reporting manager(s).)
  13F COMBINATION REPORT. (Check here if a portion of the holdings for this reporting manager are reported in this report and a portion are reported by other reporting manager(s).)
Form 13F Summary Page
Report Summary:
Number of Other Included Managers:0
Form 13F Information Table Entry Total:11
Form 13F Information Table Value Total:81,136
List of Other Included Managers:
Provide a numbered list of the name(s) and Form 13F file number(s) of all institutional investment managers with respect to which this report is filed, other than the manager filing this report.
[If there are no entries in this list, state “NONE” and omit the column headings and list entries.]